(19)
(11) EP 2 242 272 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.03.2011 Bulletin 2011/09

(43) Date of publication A2:
20.10.2010 Bulletin 2010/42

(21) Application number: 10250741.5

(22) Date of filing: 08.04.2010
(51) International Patent Classification (IPC): 
H04N 7/173(2011.01)
H04N 7/26(2006.01)
 H04N 7/24(2011.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA ME RS

(30) Priority: 18.04.2009 GB 0906721

(71) Applicant: Saffron Digital Limited
London EC1N 8FH (GB)

(72) Inventor:
  • Sedeffow, Peter Vassilev
    London E2 9NL (GB)

(74) Representative: Harkness, Katherine Joy et al
Atkinson & Company Intellectual Property Limited 37-41 Gower Street
London WC1E 6HH
London WC1E 6HH (GB)

   


(54) Transcoding video data


(57) Video data is transcoded on the fly to produce a progressive download that may be viewed while the data is being received like streaming and/or may be downloaded and played later. A locator (301) locates an input video data file on the Internet. An analyser (303) analyses a portion of the input video data file to determine coded characteristics of encoded input video. The analyser also determines an expected data volume by estimating the amount of data that would be present in an output video data file created by transcoding the input video data file. A generator (304) generates a file header for an output video data file that includes an indication of the expected volume of the output video data file. An input interface (302) receives the input video data located by locator (301) and a transcoder (305) transcodes the input video data to produce encoded output video data. The output interface supplies the encoded output video data with the file header as a stream to a receiving device. In a first embodiment, the expected volume of data in the header is over estimated and blank video chunks are added. In an alternative embodiment, the expected data of volume is under estimated and compression parameters are modified during the transcoding process.







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